A Yanomami Indian boy looks on from a hammock during a government-organised press trip in Irotatheri, Venezuela. Indigenous groups say miners recently attacked Amazon villages, but the government said there was no evidence that a massacre took place

A US soldier during Operation Pegasus, Khe Sanh, April 1968. The photo, taken by Larry Burrows, appears in the exhibition Everything Was Moving: Photographs from the 60s and 70s, at the Barbican Art Gallery, London from September 13, 2012 to January 13, 2013